Coin bank



FIG. 1 is a front elevation view of a coin bank, showing my new design;

FIG. 2 is a rear elevation view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a plan view thereof; and,

FIG. 6 is a bottom view thereof.

The ornamental design for a coin bank, as shown and described.